140109 has 4 divisors (see below), whose sum is σ = 186816. Its totient is φ = 93404.

The previous prime is 140071. The next prime is 140111. The reversal of 140109 is 901041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 901041 = 3 ⋅300347.

It is a cyclic number.

It is not a de Polignac number, because 140109 - 2⁷ = 139981 is a prime.

It is a D-number.

It is a Curzon number.

It is a plaindrome in base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 140109.

It is not an unprimeable number, because it can be changed into a prime (140159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23349 + ... + 23354.

It is an arithmetic number, because the mean of its divisors is an integer number (46704).

2¹⁴⁰¹⁰⁹ is an apocalyptic number.

It is an amenable number.

140109 is a deficient number, since it is larger than the sum of its proper divisors (46707).

140109 is an equidigital number, since it uses as much as digits as its factorization.

140109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46706.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 140109 is about 374.3113677141. The cubic root of 140109 is about 51.9384132812.

The spelling of 140109 in words is "one hundred forty thousand, one hundred nine".